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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [include/] [asm-arm/] [proc-armv/] [locks.h] - Blame information for rev 1765

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/*
 *  linux/include/asm-arm/proc-armv/locks.h
 *
 *  Copyright (C) 2000 Russell King
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 *  Interrupt safe locking assembler.
 */
#ifndef __ASM_PROC_LOCKS_H
#define __ASM_PROC_LOCKS_H
 
#define __down_op(ptr,fail)                     \
        ({                                      \
        __asm__ __volatile__(                   \
        "@ down_op\n"                           \
"       mrs     ip, cpsr\n"                     \
"       orr     lr, ip, #128\n"                 \
"       msr     cpsr_c, lr\n"                   \
"       ldr     lr, [%0]\n"                     \
"       subs    lr, lr, %1\n"                   \
"       str     lr, [%0]\n"                     \
"       msr     cpsr_c, ip\n"                   \
"       movmi   ip, %0\n"                       \
"       blmi    " SYMBOL_NAME_STR(fail)         \
        :                                       \
        : "r" (ptr), "I" (1)                    \
        : "ip", "lr", "cc", "memory");          \
        })
 
#define __down_op_ret(ptr,fail)                 \
        ({                                      \
                unsigned int ret;               \
        __asm__ __volatile__(                   \
        "@ down_op_ret\n"                       \
"       mrs     ip, cpsr\n"                     \
"       orr     lr, ip, #128\n"                 \
"       msr     cpsr_c, lr\n"                   \
"       ldr     lr, [%1]\n"                     \
"       subs    lr, lr, %2\n"                   \
"       str     lr, [%1]\n"                     \
"       msr     cpsr_c, ip\n"                   \
"       movmi   ip, %1\n"                       \
"       movpl   ip, #0\n"                       \
"       blmi    " SYMBOL_NAME_STR(fail) "\n"    \
"       mov     %0, ip"                         \
        : "=&r" (ret)                           \
        : "r" (ptr), "I" (1)                    \
        : "ip", "lr", "cc", "memory");          \
        ret;                                    \
        })
 
#define __up_op(ptr,wake)                       \
        ({                                      \
        __asm__ __volatile__(                   \
        "@ up_op\n"                             \
"       mrs     ip, cpsr\n"                     \
"       orr     lr, ip, #128\n"                 \
"       msr     cpsr_c, lr\n"                   \
"       ldr     lr, [%0]\n"                     \
"       adds    lr, lr, %1\n"                   \
"       str     lr, [%0]\n"                     \
"       msr     cpsr_c, ip\n"                   \
"       movle   ip, %0\n"                       \
"       blle    " SYMBOL_NAME_STR(wake)         \
        :                                       \
        : "r" (ptr), "I" (1)                    \
        : "ip", "lr", "cc", "memory");          \
        })
 
/*
 * The value 0x01000000 supports up to 128 processors and
 * lots of processes.  BIAS must be chosen such that sub'ing
 * BIAS once per CPU will result in the long remaining
 * negative.
 */
#define RW_LOCK_BIAS      0x01000000
#define RW_LOCK_BIAS_STR "0x01000000"
 
#define __down_op_write(ptr,fail)               \
        ({                                      \
        __asm__ __volatile__(                   \
        "@ down_op_write\n"                     \
"       mrs     ip, cpsr\n"                     \
"       orr     lr, ip, #128\n"                 \
"       msr     cpsr_c, lr\n"                   \
"       ldr     lr, [%0]\n"                     \
"       subs    lr, lr, %1\n"                   \
"       str     lr, [%0]\n"                     \
"       msr     cpsr_c, ip\n"                   \
"       movne   ip, %0\n"                       \
"       blne    " SYMBOL_NAME_STR(fail)         \
        :                                       \
        : "r" (ptr), "I" (RW_LOCK_BIAS)         \
        : "ip", "lr", "cc", "memory");          \
        })
 
#define __up_op_write(ptr,wake)                 \
        ({                                      \
        __asm__ __volatile__(                   \
        "@ up_op_read\n"                        \
"       mrs     ip, cpsr\n"                     \
"       orr     lr, ip, #128\n"                 \
"       msr     cpsr_c, lr\n"                   \
"       ldr     lr, [%0]\n"                     \
"       adds    lr, lr, %1\n"                   \
"       str     lr, [%0]\n"                     \
"       msr     cpsr_c, ip\n"                   \
"       movcs   ip, %0\n"                       \
"       blcs    " SYMBOL_NAME_STR(wake)         \
        :                                       \
        : "r" (ptr), "I" (RW_LOCK_BIAS)         \
        : "ip", "lr", "cc", "memory");          \
        })
 
#define __down_op_read(ptr,fail)                \
        __down_op(ptr, fail)
 
#define __up_op_read(ptr,wake)                  \
        ({                                      \
        __asm__ __volatile__(                   \
        "@ up_op_read\n"                        \
"       mrs     ip, cpsr\n"                     \
"       orr     lr, ip, #128\n"                 \
"       msr     cpsr_c, lr\n"                   \
"       ldr     lr, [%0]\n"                     \
"       adds    lr, lr, %1\n"                   \
"       str     lr, [%0]\n"                     \
"       msr     cpsr_c, ip\n"                   \
"       moveq   ip, %0\n"                       \
"       bleq    " SYMBOL_NAME_STR(wake)         \
        :                                       \
        : "r" (ptr), "I" (1)                    \
        : "ip", "lr", "cc", "memory");          \
        })
 
#endif

Line No.	Rev	Author	Line
1	1276	phoenix	`/*`
2			`* linux/include/asm-arm/proc-armv/locks.h`
3			`*`
4			`* Copyright (C) 2000 Russell King`
5			`*`
6			`* This program is free software; you can redistribute it and/or modify`
7			`* it under the terms of the GNU General Public License version 2 as`
8			`* published by the Free Software Foundation.`
9			`*`
10			`* Interrupt safe locking assembler.`
11			`*/`
12			`#ifndef __ASM_PROC_LOCKS_H`
13			`#define __ASM_PROC_LOCKS_H`
14
15			`#define __down_op(ptr,fail) \`
16			`({ \`
17			`__asm__ __volatile__( \`
18			`"@ down_op\n" \`
19			`" mrs ip, cpsr\n" \`
20			`" orr lr, ip, #128\n" \`
21			`" msr cpsr_c, lr\n" \`
22			`" ldr lr, [%0]\n" \`
23			`" subs lr, lr, %1\n" \`
24			`" str lr, [%0]\n" \`
25			`" msr cpsr_c, ip\n" \`
26			`" movmi ip, %0\n" \`
27			`" blmi " SYMBOL_NAME_STR(fail) \`
28			`: \`
29			`: "r" (ptr), "I" (1) \`
30			`: "ip", "lr", "cc", "memory"); \`
31			`})`
32
33			`#define __down_op_ret(ptr,fail) \`
34			`({ \`
35			`unsigned int ret; \`
36			`__asm__ __volatile__( \`
37			`"@ down_op_ret\n" \`
38			`" mrs ip, cpsr\n" \`
39			`" orr lr, ip, #128\n" \`
40			`" msr cpsr_c, lr\n" \`
41			`" ldr lr, [%1]\n" \`
42			`" subs lr, lr, %2\n" \`
43			`" str lr, [%1]\n" \`
44			`" msr cpsr_c, ip\n" \`
45			`" movmi ip, %1\n" \`
46			`" movpl ip, #0\n" \`
47			`" blmi " SYMBOL_NAME_STR(fail) "\n" \`
48			`" mov %0, ip" \`
49			`: "=&r" (ret) \`
50			`: "r" (ptr), "I" (1) \`
51			`: "ip", "lr", "cc", "memory"); \`
52			`ret; \`
53			`})`
54
55			`#define __up_op(ptr,wake) \`
56			`({ \`
57			`__asm__ __volatile__( \`
58			`"@ up_op\n" \`
59			`" mrs ip, cpsr\n" \`
60			`" orr lr, ip, #128\n" \`
61			`" msr cpsr_c, lr\n" \`
62			`" ldr lr, [%0]\n" \`
63			`" adds lr, lr, %1\n" \`
64			`" str lr, [%0]\n" \`
65			`" msr cpsr_c, ip\n" \`
66			`" movle ip, %0\n" \`
67			`" blle " SYMBOL_NAME_STR(wake) \`
68			`: \`
69			`: "r" (ptr), "I" (1) \`
70			`: "ip", "lr", "cc", "memory"); \`
71			`})`
72
73			`/*`
74			`* The value 0x01000000 supports up to 128 processors and`
75			`* lots of processes. BIAS must be chosen such that sub'ing`
76			`* BIAS once per CPU will result in the long remaining`
77			`* negative.`
78			`*/`
79			`#define RW_LOCK_BIAS 0x01000000`
80			`#define RW_LOCK_BIAS_STR "0x01000000"`
81
82			`#define __down_op_write(ptr,fail) \`
83			`({ \`
84			`__asm__ __volatile__( \`
85			`"@ down_op_write\n" \`
86			`" mrs ip, cpsr\n" \`
87			`" orr lr, ip, #128\n" \`
88			`" msr cpsr_c, lr\n" \`
89			`" ldr lr, [%0]\n" \`
90			`" subs lr, lr, %1\n" \`
91			`" str lr, [%0]\n" \`
92			`" msr cpsr_c, ip\n" \`
93			`" movne ip, %0\n" \`
94			`" blne " SYMBOL_NAME_STR(fail) \`
95			`: \`
96			`: "r" (ptr), "I" (RW_LOCK_BIAS) \`
97			`: "ip", "lr", "cc", "memory"); \`
98			`})`
99
100			`#define __up_op_write(ptr,wake) \`
101			`({ \`
102			`__asm__ __volatile__( \`
103			`"@ up_op_read\n" \`
104			`" mrs ip, cpsr\n" \`
105			`" orr lr, ip, #128\n" \`
106			`" msr cpsr_c, lr\n" \`
107			`" ldr lr, [%0]\n" \`
108			`" adds lr, lr, %1\n" \`
109			`" str lr, [%0]\n" \`
110			`" msr cpsr_c, ip\n" \`
111			`" movcs ip, %0\n" \`
112			`" blcs " SYMBOL_NAME_STR(wake) \`
113			`: \`
114			`: "r" (ptr), "I" (RW_LOCK_BIAS) \`
115			`: "ip", "lr", "cc", "memory"); \`
116			`})`
117
118			`#define __down_op_read(ptr,fail) \`
119			`__down_op(ptr, fail)`
120
121			`#define __up_op_read(ptr,wake) \`
122			`({ \`
123			`__asm__ __volatile__( \`
124			`"@ up_op_read\n" \`
125			`" mrs ip, cpsr\n" \`
126			`" orr lr, ip, #128\n" \`
127			`" msr cpsr_c, lr\n" \`
128			`" ldr lr, [%0]\n" \`
129			`" adds lr, lr, %1\n" \`
130			`" str lr, [%0]\n" \`
131			`" msr cpsr_c, ip\n" \`
132			`" moveq ip, %0\n" \`
133			`" bleq " SYMBOL_NAME_STR(wake) \`
134			`: \`
135			`: "r" (ptr), "I" (1) \`
136			`: "ip", "lr", "cc", "memory"); \`
137			`})`
138
139			`#endif`

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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [include/] [asm-arm/] [proc-armv/] [locks.h] - Blame information for rev 1765